Refer to the following partial output of the show ip bgp neighbors command:Which of the following can NOT be determined from the given output? (Choose all that apply.)
Refer to the following partial output of the show ip bgp neighbors command:Which of the following can NOT be determined from the given output? (Choose all that apply.)
Refer to the following partial output of the show ip bgp neighbors command:
300-410 Part 03 Q03 030
Which of the following can NOT be determined from the given output? (Choose all that apply.)
The ASN of rtrA
The ASN of 172.161.81.7
The best paths between rtrA and the 172.161.81.7 neighbor
The RID of the 172.161.81.7 neighbor
The status of the connection between rtrA and 172.161.81.7
Explanation:
The autonomous system number (ASN) of rtrA and the best paths between rtrA and the 172.161.81.7 neighbor cannot be determined from the given output.The show ip bgp neighbors command displays the TCP and BGP connections from a given router to its neighbors. This command is executed in EXEC mode. You can use various optional keywords to view different aspects of the neighbors. For example, this command can display the details about a given neighbor, routes advertised to or received from neighbors, and the prefix-list received by neighbors.In this case, the command is used to show the details about a specific neighbor of rtrA. The IP address (172.161.81.7) of the neighbor is provided in the command. The text BGP neighbor is 172.161.81.7 indicates the IP address of the neighbor. The text remote AS 151 indicates that the neighbor is in the ASN 151. It can also be determined from the text external link that the neighbor is an eBGP neighbor. For iBGP neighbors, the text internal link will appear. The router ID (RID) of the neighbor can be determined from the text remote router ID 10.8.22.4.The output also provides details about the state of the BGP connection, which is Established in this case. Furthermore, the duration for which the connection has been established, the duration for which BGP maintains neighbor relationship in the absence of messages, and the keepalive duration are also displayed.The state of the connection between the local router (rtrA) and the given neighbor (172.161.81.7) can be any of the following:
Idle Indicates that the local router does not accept any connection from its neighbor
Idle (admin) Indicates that the connection between the two routers has been shut down administratively by using the neighbor shutdown command
Connect Indicates that the local router has already sent an connection request to its neighbor
Active Indicates that the local router is listening for connection requests from the neighbor
OpenSent Indicates that the local router has sent an OPEN message to its neighbor
OpenConfirm Indicates that the local router has received a KEEPALIVE or UPDATE message from its neighbor
Established Indicates that a BGP connection has been successfully created between the local router and its neighborThe status of the connection between two BGP neighbors can also be viewed by using the show ip bgp summary command, as shown below:
300-410 Part 03 Q03 031
In the above output, it can be determined that the command router bgp 210 was executed on rtrA because the local AS is 210 in the output. It can be determined that the command neighbor 45.1.1.5 shutdown was issued on rtrA because the state of the neighbor relationship with the router at 45.1.1.5 is listed as IDLE(ADMIN).
All the other options are incorrect because the respective details are displayed by the show ip bgp neighbors command.
Objective:
Layer 3 Technologies
Sub-Objective:
Configure and verify eBGP (IPv4 and IPv6 address families)
